Simply enter the energy in joules, select the desired calorie unit type, and click “Convert” to obtain the energy result in kilocalories. Use this tool to effortlessly convert between different calorie units for various applications. Click “Reset” to clear the fields and start a new conversion.
Joules to Kilocalories Conversion Calculator
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How to Convert from Joules to kcal?
Joules to Thermochemical / Food Kilocalories
1 kcalth = 4184 J
The energy expressed in joules E(J) is equivalent to the energy measured in kilocalories E(kcal-th) divided by 4184:
E(kcal) = E(J) / 4184
Example
Let’s say we have an energy value of 500,000 joules (500 kJ) and we want to convert it to thermochemical kilocalories. The conversion factor between joules and kilocalories is 1 joule = 0.00023900573613 kilocalories.
To convert 500,000 joules to thermochemical kilocalories, we can use the following calculation:
500,000 joules * 0.00023900573613 kilocalories/joule = 119.502868065 kilocalories
So, 500,000 joules is equivalent to approximately 119.502868065 thermochemical kilocalories.
Joules to International Kilocalories
1 kcalIT = 4186,8 J
The amount of energy, measured in joules E(J), can be determined by dividing the energy in international kilocalories E(kcal-IT) by 4186.8:
E(kcal-IT) = E(J) / 4186.8
Example
Let’s say you have a food item that contains 5000 joules of energy. You want to convert this energy value into international kilocalories.
The conversion factor between joules and kilocalories is 1 kilocalorie = 4186,8 joules.
To convert the energy from joules to kilocalories, you can use the following formula:
E(kcal-IT) = E(J) / 4186.8
Substituting the given value into the formula, we have:
E(kcal-IT) = 5000 / 4186,8 ≈ 1.194229483 kilocalories
Therefore, the food item containing 5000 joules of energy is approximately equivalent to 1.194229483 international kilocalories.
Joules to 15°C Kilocalories
1 kcal15 = 4185,5 J
The energy in joules E(J) is equal to the energy in 15°C kilocalories E(kcal15) divided by 4185,5:
E(kcal15) = E(J) / 4185,5
Example
Let’s say we have an object that absorbs 1000 joules of energy when its temperature increases by 15°C. We want to convert this energy value to kilocalories.
To convert joules to kilocalories, we can use the conversion factor that 1 kilocalorie is equal to 4185,5 joules.
First, we calculate the energy in kilocalories by dividing the energy in joules by the conversion factor:
1000 joules / 4185,5 joules/kcal = 0.238920081 kilocalories
Therefore, the object has absorbed approximately 0.238920081 kilocalories of energy when its temperature increased by 15°C.
Please note that this conversion assumes that the object’s specific heat capacity remains constant over the temperature change.
Joules to 20°C Kilocalories
1 kcal20 = 4182 J
The amount of energy, measured in joules E(J), can be calculated by dividing the energy in kilocalories at 20°C E(kcal20) by 4182:
To determine E(kcal20), the formula is as follows:
E(kcal20) = E(J) / 4182
Example
Convert 4000 joules to kilocalories.
E(kcal20) = 4000 J / 4182 = 0.95648015 kcal20
